7959388640 has 48 divisors (see below), whose sum is σ = 21490352352. Its totient is φ = 2728932864.

The previous prime is 7959388603. The next prime is 7959388643. The reversal of 7959388640 is 468839597.

It is a super-2 number, since 2×7959388640² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7959388640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7959388643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3552179 + ... + 3554418.

It is an arithmetic number, because the mean of its divisors is an integer number (447715674).

Almost surely, 2^7959388640 is an apocalyptic number.

7959388640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7959388640 is an abundant number, since it is smaller than the sum of its proper divisors (13530963712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7959388640 is a wasteful number, since it uses less digits than its factorization.

7959388640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7106619 (or 7106611 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 59.

The square root of 7959388640 is about 89215.4058445065. The cubic root of 7959388640 is about 1996.6099771190.

The spelling of 7959388640 in words is "seven billion, nine hundred fifty-nine million, three hundred eighty-eight thousand, six hundred forty".